internal Region CreateRegion(RegionVersionOne v1Region)
{
Region region = null;
if (v1Region != null)
{
region = new Region
{
ByteLength = v1Region.Length,
ByteOffset = v1Region.Offset,
EndColumn = v1Region.EndColumn,
EndLine = v1Region.EndLine,
StartColumn = v1Region.StartColumn,
StartLine = v1Region.StartLine
};
bool startIsTextBased = v1Region.StartLine > 0;
bool endIsTextBased = v1Region.EndLine > 0 || v1Region.EndColumn > 0;
if (startIsTextBased && endIsTextBased && v1Region.EndColumn == 0)
{
region.EndColumn = v1Region.StartColumn;
}
}
return(region);
}
internal RegionVersionOne CreateRegionVersionOne(Region v2Region, Uri uri)
{
RegionVersionOne region = null;
if (v2Region != null)
{
region = new RegionVersionOne();
if (v2Region.StartLine > 0 ||
v2Region.EndLine > 0 ||
v2Region.StartColumn > 0 ||
v2Region.EndColumn > 0 ||
v2Region.CharOffset > 0 ||
v2Region.CharLength > 0)
{
if (v2Region.StartLine > 0)
{
// The start of the region is described by line/column
region.StartLine = v2Region.StartLine;
region.StartColumn = v2Region.StartColumn > 0
? v2Region.StartColumn
: 1;
}
else
{
// The start of the region is described by character offset
// Try to get the byte offset using the file encoding and contents
region.Offset = ConvertCharOffsetToByteOffset(v2Region.CharOffset, uri);
}
if (v2Region.CharLength > 0)
{
// The end of the region is described by character length
// Try to get the byte length using the file encoding and contents
region.Length = GetRegionByteLength(v2Region, uri);
}
else if (v2Region.EndLine > 0)
{
region.EndLine = v2Region.EndLine;
if (v2Region.EndColumn > 0)
{
region.EndColumn = v2Region.EndColumn;
}
else
{
// In v2, if endColumn is missing, then the region extends to the end
// of the line (exclusive of any newline sequence). Use the file contents
// and encoding to determine how many columns are in the end line.
region.EndColumn = GetRegionEndColumn(v2Region, uri);
}
}
else if (v2Region.EndColumn > 0)
{
region.EndColumn = v2Region.EndColumn;
}
else
{
// THIS IS A PROBLEM. IF ALL THE "END" PROPERTIES ARE MISSING,
// IT MEANS "THE REST OF THE StartLine". BUT IF CHARLENGTH IS
// PRESENT BUT 0, IT MEANS "INSERTION POINT". AND WE CAN'T TELL
// THE DIFFERENCE.
// TODO: Issue #932
// Assume it's an insertion point
region.EndLine = region.EndColumn = region.Length = 0;
}
}
else
{
// There are no text-related properties. Therefore either the region is
// described entirely by binary-related properties, or the region is an
// insertion point at the start of the file.
region.Length = v2Region.ByteLength;
region.Offset = v2Region.ByteOffset;
}
}
return(region);
}
